The models
comes in two different versions. The first from 1967 and a later
version from 1969.

History:

In 1962
India started work on the Thumba Equatorial Rocket Launching Station (TERLS).

The
first sounding rocket launched here was a Nike-Apache rocket on 21 Nov
1963.

But work
started to develop a pure indian sounding rocket. This was known as The
Rohini Sounding Rocket (RSR) program. The single-stage Rohini (RH-75)
rocket was a solid powered rocket. It was weighing 32 Kg with an
additional 7 Kg payload. It was launched on November 20, 1967.

It
reached an altitude of around 10 km. The rohoni RH-75 programme led to
other and larger sounding rockets. But the experiences from working with
solid rockets finally led to the development of real space launchers like
Indias GSLV (Geo-Synchronous Launch Vehicle) and PSLV (Polar Satellite
Launch Vehicle)

Thanks to:

Sathya Kumar, David Fitch and Eric Truax.

Flying model:

Eric Truax has made a mod-kit for this model, so it
can be fitted with a mmx-rocket-engine: